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path: root/drivers/usb/serial/ftdi_sio.c
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Diffstat (limited to 'drivers/usb/serial/ftdi_sio.c')
-rw-r--r--drivers/usb/serial/ftdi_sio.c194
1 files changed, 77 insertions, 117 deletions
diff --git a/drivers/usb/serial/ftdi_sio.c b/drivers/usb/serial/ftdi_sio.c
index 7ea221d42dba..b5cef322826f 100644
--- a/drivers/usb/serial/ftdi_sio.c
+++ b/drivers/usb/serial/ftdi_sio.c
@@ -54,15 +54,14 @@ struct ftdi_private {
int custom_divisor; /* custom_divisor kludge, this is for
baud_base (different from what goes to the
chip!) */
- __u16 last_set_data_urb_value ;
- /* the last data state set - needed for doing
- * a break
- */
+ u16 last_set_data_value; /* the last data state set - needed for doing
+ * a break
+ */
int flags; /* some ASYNC_xxxx flags are supported */
unsigned long last_dtr_rts; /* saved modem control outputs */
char prev_status; /* Used for TIOCMIWAIT */
char transmit_empty; /* If transmitter is empty or not */
- __u16 interface; /* FT2232C, FT2232H or FT4232H port interface
+ u16 interface; /* FT2232C, FT2232H or FT4232H port interface
(0 for FT232/245) */
speed_t force_baud; /* if non-zero, force the baud rate to
@@ -1063,10 +1062,10 @@ static int ftdi_get_modem_status(struct usb_serial_port *port,
static unsigned short int ftdi_232am_baud_base_to_divisor(int baud, int base);
static unsigned short int ftdi_232am_baud_to_divisor(int baud);
-static __u32 ftdi_232bm_baud_base_to_divisor(int baud, int base);
-static __u32 ftdi_232bm_baud_to_divisor(int baud);
-static __u32 ftdi_2232h_baud_base_to_divisor(int baud, int base);
-static __u32 ftdi_2232h_baud_to_divisor(int baud);
+static u32 ftdi_232bm_baud_base_to_divisor(int baud, int base);
+static u32 ftdi_232bm_baud_to_divisor(int baud);
+static u32 ftdi_2232h_baud_base_to_divisor(int baud, int base);
+static u32 ftdi_2232h_baud_to_divisor(int baud);
static struct usb_serial_driver ftdi_sio_device = {
.driver = {
@@ -1136,14 +1135,14 @@ static unsigned short int ftdi_232am_baud_to_divisor(int baud)
return ftdi_232am_baud_base_to_divisor(baud, 48000000);
}
-static __u32 ftdi_232bm_baud_base_to_divisor(int baud, int base)
+static u32 ftdi_232bm_baud_base_to_divisor(int baud, int base)
{
static const unsigned char divfrac[8] = { 0, 3, 2, 4, 1, 5, 6, 7 };
- __u32 divisor;
+ u32 divisor;
/* divisor shifted 3 bits to the left */
int divisor3 = base / 2 / baud;
divisor = divisor3 >> 3;
- divisor |= (__u32)divfrac[divisor3 & 0x7] << 14;
+ divisor |= (u32)divfrac[divisor3 & 0x7] << 14;
/* Deal with special cases for highest baud rates. */
if (divisor == 1)
divisor = 0;
@@ -1152,22 +1151,22 @@ static __u32 ftdi_232bm_baud_base_to_divisor(int baud, int base)
return divisor;
}
-static __u32 ftdi_232bm_baud_to_divisor(int baud)
+static u32 ftdi_232bm_baud_to_divisor(int baud)
{
return ftdi_232bm_baud_base_to_divisor(baud, 48000000);
}
-static __u32 ftdi_2232h_baud_base_to_divisor(int baud, int base)
+static u32 ftdi_2232h_baud_base_to_divisor(int baud, int base)
{
static const unsigned char divfrac[8] = { 0, 3, 2, 4, 1, 5, 6, 7 };
- __u32 divisor;
+ u32 divisor;
int divisor3;
/* hi-speed baud rate is 10-bit sampling instead of 16-bit */
divisor3 = base * 8 / (baud * 10);
divisor = divisor3 >> 3;
- divisor |= (__u32)divfrac[divisor3 & 0x7] << 14;
+ divisor |= (u32)divfrac[divisor3 & 0x7] << 14;
/* Deal with special cases for highest baud rates. */
if (divisor == 1)
divisor = 0;
@@ -1182,7 +1181,7 @@ static __u32 ftdi_2232h_baud_base_to_divisor(int baud, int base)
return divisor;
}
-static __u32 ftdi_2232h_baud_to_divisor(int baud)
+static u32 ftdi_2232h_baud_to_divisor(int baud)
{
return ftdi_2232h_baud_base_to_divisor(baud, 120000000);
}
@@ -1195,7 +1194,7 @@ static int update_mctrl(struct usb_serial_port *port, unsigned int set,
{
struct ftdi_private *priv = usb_get_serial_port_data(port);
struct device *dev = &port->dev;
- unsigned urb_value;
+ unsigned value;
int rv;
if (((set | clear) & (TIOCM_DTR | TIOCM_RTS)) == 0) {
@@ -1204,20 +1203,20 @@ static int update_mctrl(struct usb_serial_port *port, unsigned int set,
}
clear &= ~set; /* 'set' takes precedence over 'clear' */
- urb_value = 0;
+ value = 0;
if (clear & TIOCM_DTR)
- urb_value |= FTDI_SIO_SET_DTR_LOW;
+ value |= FTDI_SIO_SET_DTR_LOW;
if (clear & TIOCM_RTS)
- urb_value |= FTDI_SIO_SET_RTS_LOW;
+ value |= FTDI_SIO_SET_RTS_LOW;
if (set & TIOCM_DTR)
- urb_value |= FTDI_SIO_SET_DTR_HIGH;
+ value |= FTDI_SIO_SET_DTR_HIGH;
if (set & TIOCM_RTS)
- urb_value |= FTDI_SIO_SET_RTS_HIGH;
+ value |= FTDI_SIO_SET_RTS_HIGH;
rv = usb_control_msg(port->serial->dev,
usb_sndctrlpipe(port->serial->dev, 0),
FTDI_SIO_SET_MODEM_CTRL_REQUEST,
FTDI_SIO_SET_MODEM_CTRL_REQUEST_TYPE,
- urb_value, priv->interface,
+ value, priv->interface,
NULL, 0, WDR_TIMEOUT);
if (rv < 0) {
dev_dbg(dev, "%s Error from MODEM_CTRL urb: DTR %s, RTS %s\n",
@@ -1236,12 +1235,12 @@ static int update_mctrl(struct usb_serial_port *port, unsigned int set,
}
-static __u32 get_ftdi_divisor(struct tty_struct *tty,
+static u32 get_ftdi_divisor(struct tty_struct *tty,
struct usb_serial_port *port)
{
struct ftdi_private *priv = usb_get_serial_port_data(port);
struct device *dev = &port->dev;
- __u32 div_value = 0;
+ u32 div_value = 0;
int div_okay = 1;
int baud;
@@ -1299,7 +1298,7 @@ static __u32 get_ftdi_divisor(struct tty_struct *tty,
case FT232RL: /* FT232RL chip */
case FTX: /* FT-X series */
if (baud <= 3000000) {
- __u16 product_id = le16_to_cpu(
+ u16 product_id = le16_to_cpu(
port->serial->dev->descriptor.idProduct);
if (((product_id == FTDI_NDI_HUC_PID) ||
(product_id == FTDI_NDI_SPECTRA_SCU_PID) ||
@@ -1346,26 +1345,26 @@ static __u32 get_ftdi_divisor(struct tty_struct *tty,
static int change_speed(struct tty_struct *tty, struct usb_serial_port *port)
{
struct ftdi_private *priv = usb_get_serial_port_data(port);
- __u16 urb_value;
- __u16 urb_index;
- __u32 urb_index_value;
+ u16 value;
+ u16 index;
+ u32 index_value;
int rv;
- urb_index_value = get_ftdi_divisor(tty, port);
- urb_value = (__u16)urb_index_value;
- urb_index = (__u16)(urb_index_value >> 16);
+ index_value = get_ftdi_divisor(tty, port);
+ value = (u16)index_value;
+ index = (u16)(index_value >> 16);
if ((priv->chip_type == FT2232C) || (priv->chip_type == FT2232H) ||
(priv->chip_type == FT4232H) || (priv->chip_type == FT232H)) {
/* Probably the BM type needs the MSB of the encoded fractional
* divider also moved like for the chips above. Any infos? */
- urb_index = (__u16)((urb_index << 8) | priv->interface);
+ index = (u16)((index << 8) | priv->interface);
}
rv = usb_control_msg(port->serial->dev,
usb_sndctrlpipe(port->serial->dev, 0),
FTDI_SIO_SET_BAUDRATE_REQUEST,
FTDI_SIO_SET_BAUDRATE_REQUEST_TYPE,
- urb_value, urb_index,
+ value, index,
NULL, 0, WDR_SHORT_TIMEOUT);
return rv;
}
@@ -2140,29 +2139,29 @@ static void ftdi_break_ctl(struct tty_struct *tty, int break_state)
{
struct usb_serial_port *port = tty->driver_data;
struct ftdi_private *priv = usb_get_serial_port_data(port);
- __u16 urb_value;
+ u16 value;
/* break_state = -1 to turn on break, and 0 to turn off break */
/* see drivers/char/tty_io.c to see it used */
- /* last_set_data_urb_value NEVER has the break bit set in it */
+ /* last_set_data_value NEVER has the break bit set in it */
if (break_state)
- urb_value = priv->last_set_data_urb_value | FTDI_SIO_SET_BREAK;
+ value = priv->last_set_data_value | FTDI_SIO_SET_BREAK;
else
- urb_value = priv->last_set_data_urb_value;
+ value = priv->last_set_data_value;
if (usb_control_msg(port->serial->dev,
usb_sndctrlpipe(port->serial->dev, 0),
FTDI_SIO_SET_DATA_REQUEST,
FTDI_SIO_SET_DATA_REQUEST_TYPE,
- urb_value , priv->interface,
+ value , priv->interface,
NULL, 0, WDR_TIMEOUT) < 0) {
dev_err(&port->dev, "%s FAILED to enable/disable break state (state was %d)\n",
__func__, break_state);
}
dev_dbg(&port->dev, "%s break state is %d - urb is %d\n", __func__,
- break_state, urb_value);
+ break_state, value);
}
@@ -2192,12 +2191,8 @@ static void ftdi_set_termios(struct tty_struct *tty,
struct ftdi_private *priv = usb_get_serial_port_data(port);
struct ktermios *termios = &tty->termios;
unsigned int cflag = termios->c_cflag;
- __u16 urb_value; /* will hold the new flags */
-
- /* Added for xon/xoff support */
- unsigned int iflag = termios->c_iflag;
- unsigned char vstop;
- unsigned char vstart;
+ u16 value, index;
+ int ret;
/* Force baud rate if this device requires it, unless it is set to
B0. */
@@ -2258,44 +2253,44 @@ static void ftdi_set_termios(struct tty_struct *tty,
no_skip:
/* Set number of data bits, parity, stop bits */
- urb_value = 0;
- urb_value |= (cflag & CSTOPB ? FTDI_SIO_SET_DATA_STOP_BITS_2 :
- FTDI_SIO_SET_DATA_STOP_BITS_1);
+ value = 0;
+ value |= (cflag & CSTOPB ? FTDI_SIO_SET_DATA_STOP_BITS_2 :
+ FTDI_SIO_SET_DATA_STOP_BITS_1);
if (cflag & PARENB) {
if (cflag & CMSPAR)
- urb_value |= cflag & PARODD ?
- FTDI_SIO_SET_DATA_PARITY_MARK :
- FTDI_SIO_SET_DATA_PARITY_SPACE;
+ value |= cflag & PARODD ?
+ FTDI_SIO_SET_DATA_PARITY_MARK :
+ FTDI_SIO_SET_DATA_PARITY_SPACE;
else
- urb_value |= cflag & PARODD ?
- FTDI_SIO_SET_DATA_PARITY_ODD :
- FTDI_SIO_SET_DATA_PARITY_EVEN;
+ value |= cflag & PARODD ?
+ FTDI_SIO_SET_DATA_PARITY_ODD :
+ FTDI_SIO_SET_DATA_PARITY_EVEN;
} else {
- urb_value |= FTDI_SIO_SET_DATA_PARITY_NONE;
+ value |= FTDI_SIO_SET_DATA_PARITY_NONE;
}
switch (cflag & CSIZE) {
case CS5:
dev_dbg(ddev, "Setting CS5 quirk\n");
break;
case CS7:
- urb_value |= 7;
+ value |= 7;
dev_dbg(ddev, "Setting CS7\n");
break;
default:
case CS8:
- urb_value |= 8;
+ value |= 8;
dev_dbg(ddev, "Setting CS8\n");
break;
}
/* This is needed by the break command since it uses the same command
- but is or'ed with this value */
- priv->last_set_data_urb_value = urb_value;
+ priv->last_set_data_value = value;
if (usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
FTDI_SIO_SET_DATA_REQUEST,
FTDI_SIO_SET_DATA_REQUEST_TYPE,
- urb_value , priv->interface,
+ value , priv->interface,
NULL, 0, WDR_SHORT_TIMEOUT) < 0) {
dev_err(ddev, "%s FAILED to set databits/stopbits/parity\n",
__func__);
@@ -2326,65 +2321,30 @@ no_data_parity_stop_changes:
set_mctrl(port, TIOCM_DTR | TIOCM_RTS);
}
- /* Set flow control */
- /* Note device also supports DTR/CD (ugh) and Xon/Xoff in hardware */
no_c_cflag_changes:
- if (cflag & CRTSCTS) {
- dev_dbg(ddev, "%s Setting to CRTSCTS flow control\n", __func__);
- if (usb_control_msg(dev,
- usb_sndctrlpipe(dev, 0),
- FTDI_SIO_SET_FLOW_CTRL_REQUEST,
- FTDI_SIO_SET_FLOW_CTRL_REQUEST_TYPE,
- 0 , (FTDI_SIO_RTS_CTS_HS | priv->interface),
- NULL, 0, WDR_TIMEOUT) < 0) {
- dev_err(ddev, "urb failed to set to rts/cts flow control\n");
- }
+ /* Set hardware-assisted flow control */
+ value = 0;
+
+ if (C_CRTSCTS(tty)) {
+ dev_dbg(&port->dev, "enabling rts/cts flow control\n");
+ index = FTDI_SIO_RTS_CTS_HS;
+ } else if (I_IXON(tty)) {
+ dev_dbg(&port->dev, "enabling xon/xoff flow control\n");
+ index = FTDI_SIO_XON_XOFF_HS;
+ value = STOP_CHAR(tty) << 8 | START_CHAR(tty);
} else {
- /*
- * Xon/Xoff code
- *
- * Check the IXOFF status in the iflag component of the
- * termios structure. If IXOFF is not set, the pre-xon/xoff
- * code is executed.
- */
- if (iflag & IXOFF) {
- dev_dbg(ddev, "%s request to enable xonxoff iflag=%04x\n",
- __func__, iflag);
- /* Try to enable the XON/XOFF on the ftdi_sio
- * Set the vstart and vstop -- could have been done up
- * above where a lot of other dereferencing is done but
- * that would be very inefficient as vstart and vstop
- * are not always needed.
- */
- vstart = termios->c_cc[VSTART];
- vstop = termios->c_cc[VSTOP];
- urb_value = (vstop << 8) | (vstart);
-
- if (usb_control_msg(dev,
- usb_sndctrlpipe(dev, 0),
- FTDI_SIO_SET_FLOW_CTRL_REQUEST,
- FTDI_SIO_SET_FLOW_CTRL_REQUEST_TYPE,
- urb_value , (FTDI_SIO_XON_XOFF_HS
- | priv->interface),
- NULL, 0, WDR_TIMEOUT) < 0) {
- dev_err(&port->dev, "urb failed to set to "
- "xon/xoff flow control\n");
- }
- } else {
- /* else clause to only run if cflag ! CRTSCTS and iflag
- * ! XOFF. CHECKME Assuming XON/XOFF handled by tty
- * stack - not by device */
- dev_dbg(ddev, "%s Turning off hardware flow control\n", __func__);
- if (usb_control_msg(dev,
- usb_sndctrlpipe(dev, 0),
- FTDI_SIO_SET_FLOW_CTRL_REQUEST,
- FTDI_SIO_SET_FLOW_CTRL_REQUEST_TYPE,
- 0, priv->interface,
- NULL, 0, WDR_TIMEOUT) < 0) {
- dev_err(ddev, "urb failed to clear flow control\n");
- }
- }
+ dev_dbg(&port->dev, "disabling flow control\n");
+ index = FTDI_SIO_DISABLE_FLOW_CTRL;
}
+
+ index |= priv->interface;
+
+ ret = usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
+ FTDI_SIO_SET_FLOW_CTRL_REQUEST,
+ FTDI_SIO_SET_FLOW_CTRL_REQUEST_TYPE,
+ value, index, NULL, 0, WDR_TIMEOUT);
+ if (ret < 0)
+ dev_err(&port->dev, "failed to set flow control: %d\n", ret);
}
/*
generated by cgit v1.2.3 (git 2.39.0) at 2024-12-12 12:32:50 +0300